Combined primary and secondary battery system.



, J. H. GUGLER. COMBINED PRIMARY AND SECONDARY BATTERY SYSTEM.APPLIGATION FILED NOV. 6, 1909.

979, 1 54, Patented Dec. 20, 1910.

anew,

that the potential of the battery 0 JULIUS H. GUGLER, OF MILWAUKEE,WISCONSIN.

COMBINED PRIMARY AND SECONDARY BATTERY SYSTEM.

Specification of Letters Fatent.

Patented Dec. 20, 1910.

Application filed November 6, 1909. Serial No. 528,668.

7 0 all whom it may concern:

Be it known that I, JL'LIIS ll. Grown, of Milwaukee, \Visconsin. haveinvented a Combined Primary andSccondary Battery System, of which thefollowing is a specification.

This invention has relation to battery F1375. tems for generatingpower,and the object I have in view is to devise an arrangement to enable aprimary battery to be utilized with improved economy and especially inconnection with an auxiliary secondary battery.

Primary batteries of the two-fluid type are subject to rapiddeterioration with time through osmose through the porous cell, whichcauses a mingling of the two fluids and consequently deterioration.Hence it is desirous in those cases where batteries are used only partof the time to provide some means whereby currents can be continuallydrawn from them and. stored up, and thisis done by placing a secondarybattery in parallel therewith.

Hcretofore primary batteries have been arranged to supply a powencircuitin conjunction with secondary batteries which equalize their potential,but I aim to improve on the usual arrangement in a manner which willenable a smaller size of sec:

ondary battery to be utilized with nearly equal economy.

The invention is especially adaptable to :ases where the use of thebattery is intermittent, as for example, in the operation ofself-playing musical instruments and amuse-- ment devices of likecharacter. v For the better understanding of my invention I haveillustrated thearrangement constituting my invention in the accompanyingdrawing, reference being had to the following description thereof. Inthis drawing, a represents a primary battery which. may consist of anynumber of cells, and b a secondary battery of a suitable number of cellsto make its potential substantially equal to that of the primarybattery, but it will be of course understood 7 rises to approximateequality to the battery a as it becomes charged by the latter d fallsagain as it is discharged. The sai both batteries is connected by a lead0 to one terminal of the scrvicocircuit (Z,-1n

which may be any currcnt-consuming device, illustrated symbolically asa. motor c. The

other terminal of said circuit (l is permanently connected to the bladef of a switch, which has two terminals g and it connected b leads 1' andj to the other poles of the the switch-blade f is closed, both batteriesare connected in parallel with the circuit oi;

Moreover the two leads 2' and are perinanently connected togetlier by aresistance r. The switch-blade f is here shown as electro magneticallyoperated by a solenoid m having a core 1 connected with the blade j;said solenoid being in a branch-circuit 7c connected to the batteriesand having a coinoperated switch 0 in series therewith whereby thedepositing of a coin in thereceptacle, as usually provided inself-playing pianos and the like, will cause the switch I to be closedand the motor a to operate; but the construction of the switch 0 formsnopart of this present invention.

The arrangement is such that, when the circuit is closed, both batteriesare in par allel and the resistance r is short-circulted, but when thecircuit is opened the reels. ance r limits the current which can besupplied by the battery (1. and thus prevents unnccessary overchargingof the secondary battery and waste of power.

By providing the contact. I gain the advantage among; others that the r-nary battery is always available for maximum service at all timesindependently of the condition of the secondary hatter for example whena newly charged primary battery is placed in circuit at a. time when thesec;

ondary battery is fully discharged. In such condition all. the currentwill of course be drawn. from the primary battery as long as the motoris turned. on, and when the latter is disconnected the current willcontinue to flow through the ynfimary battery and. charge the secondary.

Having thus described my invention, what I claim as new and desire tosecure by Let ters Patenni 1. The combination of a prnnary battery,

, a secondary battery and a service-circuit all 6G batteries a and Z)respectively; so that when lie disconnected from the other two except asI hereinafter stated, a device adapted to connect said three polestogether, and a re; stt ance permanentl connecting said diseon nectedpole of the prii'nary battery with said disconnected pole of thesecondary battery; the other pole of said prin'iar and secondary batterybeing permanently connected and the other pole of said service-circuitbe ing connected thereto when said first-tanned poles are connectedtogether.

The comhinaticm. of a nriinary hatter) a secondary batter one pole ofwhich is permanentl connected to the corresponding pole of said primarvbattery, a resistance permanenttx' connecting the other poles of the twobatteries, :1 service-circuit, and a device adapted to connect saidservice-circuit in circuit with said batteries and simultaneonstyshort-circuit said resistance.

-i. The combination of a t n-hoary battery, a secondary battery one pote01'' which is permanently connected to the corresponding pole of saidprimary battery, a resistance permanentl t' connecting the other polesof the two batteries, :1 eervieewircnit', and a. de vice adapted toconnect said service-circuit in circuit with said hatteries andaimnttaneonsty shm't-eirenit fitttti resistance; in conjunction with anelectroniagnetic device;

